Sometimes one need to give visitors access to just a portion of the event that is applicable to them. This is possible with the use of albums and the album privacy feature. There are several privacy options one can set for the event, but for this particular use case one would need to use the password per album feature.
Albums allow you to separate and organise an event's photos into smaller collections. When combined with the album password option, you can protect each album you create with a password. A visitor will be required to enter the applicable password in order to access that album. Each album can have a different password.
The steps to set this up for an event is as follows:
First step is to enable album privacy on the event. To do this navigate to the Albums tab on the event. Open the privacy settings window and select the option called "Require a password per album".
The next step is to set a password for each album. You can do this in two ways. For any new albums you need to create still, simply capture the password field when creating a new album. For any existing albums you may have created already, select the change password option for each event.
Mix private and public albums
It is possible to still have public albums among your private ones. Simply leave the password empty to not require any credentials from a visitor for that album.
Please always take note the passwords you've set, it won't be possible to see what a password is later. However, you can always change an album's password later.